|Our World: Arecibo - The Largest Radio Telescope on Earth - National Institute of Aerospace|
Learn about radio waves, a special type of ligt that has a longer wavelength and less energy than the light we see. Find out how NASA uses radio waves to learn more about the universe and our own atmosphere with a giant telescope in Puerto Rico.
Keywords: NASA, NASA eClips, NIA, Our World, elementary, video, science, education, Galileo, Hubble, telescopes, radio, light, astronomy, Jupiter, diameter
|Our World: Changing Theories - The Scientific Method in Action|
See how scientists develop ideas about the universe, then set out to prove what they think is right. Often this search leads to new questions and new discoveries. Find out how the Mars Phoenix Lander has changed what NASA scientists believe about Mars.
Keywords: NASA; NASA eClips; NIA; Our World; elementary; video; education; engineering; technology; science; Earth; space; Copernicus; Galileo; moon phases; hypothesis; scientific method; observations; questions; Mars; Phoenix; Mariner